Cherry-pick #480: Add option to skip pybind11 and SWIG

[azeey]

🦟 Bug fix

Summary

Backport #480 so we have an easy way of disabling pybind11. The plan is to disable pybind11 by default on windows in a followup PR.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Rebase-Merge.

[codecov]

Codecov Report

Merging #528 (6f64808) into ign-math6 (27cdb93) will not change coverage.
The diff coverage is n/a.

❗ Current head 6f64808 differs from pull request most recent head 5034fce. Consider uploading reports for the commit 5034fce to get more accurate results

@@            Coverage Diff             @@
##           ign-math6     #528   +/-   ##
==========================================
  Coverage      99.68%   99.68%           
==========================================
  Files             73       73           
  Lines           6918     6918           
==========================================
  Hits            6896     6896           
  Misses            22       22           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[scpeters]

looks good; please rebase and merge

[scpeters]

auto-rebase-and-merge enabled